Improvement in door-springs



N.FETERS. FROTDJJTMOGRAFHER, WASHINGTON, D C.

LEMAN A. WARNER, OF FREEPORT, ILLINOIS.

IMPROVEMENT IN DOOR-SPRINGS.

Specification forming part of Letters Patent No. 167,284., dated August3i, 1875; application filed April 12, 1875.

To all whom it may concern:

Be it known that I, LEMAN A. WARNER, of Freeport, in the county ofStephenson and State of Illinois, have invented a Door-Spring, adaptedto closing doors, grates, shutters, screens, 850., and holding themclosed, of which the following is a specification:

My invention consists mainly in the peculiar construction of anintermediate elastic elbow-joint, as will be hereinafter more fullydescribed.

In describing my invention I refer to drawings which accompany and formpart of this specification, in which Figure I shows the device inposition with the door closed, and Fig. II shows the same when the dooris swung open.

In the drawings, A represents a shaft or stud, around which is coiled aspring, B. The sprin g-coils and arms, being double, are referred to asin the singular number. 0 represents the arm or lever of the spring. Dis an intermediate coil-spring formed in the arm 0, constituting anelastic joint or elbow. E is a loop or eye at the end of the arm bywhich the spring is attached to the door. a is a hook made fast to thedoor. b is a stud or pin passing through the coil D, having caps overthe ends and an enlargement in the middle, for the purpose of keepingthe coil in place and in line. d cl are brackets or lugs fitted toreceive the journals of the shaft A, and by which the whole device isfastened to the door jamb or ca ing. The upper lug is fitted withnotches to receive the pin 0, Fig. I. c is a pin passing through a holein the shaft A, and which, dropping into a notch in the lug, holds thespring to as high a tension as is desired.

The device is constructed as follows: The shaft A being provided withholes, the springwire is cut the proper length and doubled, forming theloop E in the center. The ends are inserted in the holes in the shaft Aand coiled round it, forming the spring B, the remaining portion of thewire forming the arm 0. At a proper distance from the loop E the coil Dis formed in the arm 0, being coiled in the opposite direction from thespring B, and forming an elastic joint or elbow, (somewhat like atable-hinge, the portion of the arm on either side forming. the flaps,)which opens and closes with the door when in use, thus lengthening thearm 0 when the door opens, and accommodating itself to the angle formedby thedoor and door-jamb, and allowing the door to swing open onehundred and eighty degrees, while the arm 0 is turner only about ninetydegrees. The advantage gained is that the spring may be tightened, so asto hold the door firmly shut without danger of bending or breaking whenthe door is opened one hundred and eighty degrees.

The method of application is shown in Fig. 2. The lugs d d are screwedto the doorjamb, and the loop E is passed between the two portions ofthe arm 0 and attached to hoop a. A

The strain is regulated by means of the pin 0. The loop E is readilydetached from the door when desired. The device may be applied to theother side of the door by placing it above, and attaching it by means ofa bracket hook or pin, extending up from the door far enough to receivethe end of the spring.

What I claim as my invention is l. The coil-spring D composed of twoequal parallel coils, formed in the two parts of the arm or lever O,with suitable fastenings for the ends of the arms, in the mannerdescribed and in connection with the pin Z), constituting an elasticelbow-joint, whereby the arm is folded up when the door is closed, andis allowed to open and lengthen. out when the door is opened,constructed and operating substantially as described and shown, for thepurpose specified.

2. The improved door-spring, consisting of the shaft A, or itsequivalent, the spring B, the arm or arms 0 G, the loop E, and thecoilspring D, all substantially as described, and for the purposespecified.

LEMAN A. WARNER.

Witeesses:

J. F. KLEGKNER, ALLEN J ANSSEN.

